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This document describes the MULTIPLEX Floats Kit, designed for the TwinStar II and comparable models. The kit, identified by part number #73 3061, allows models with a maximum take-off weight of approximately 1600g (land-based version) to operate from water or snow. The floats themselves are constructed from ELAPOR® foam, a material chosen for its durability and suitability for this application, differentiating it from less robust Styrofoam.
The primary function of this kit is to convert a land-based model aircraft into a floatplane, enabling operations from water surfaces. This significantly expands the model's versatility, allowing for take-offs and landings on lakes, rivers, or even snow-covered terrain. The floats provide the necessary buoyancy for water operations and a stable platform for snow take-offs and landings.
A key component of the float system is the water rudder, which is essential for steering the model on water. For the TwinStar II, the document notes that the water rudder can be used in conjunction with or as an alternative to an enlarged vertical stabiliser, which might otherwise be required due to the altered lateral area distribution caused by the floats. The TwinStar II, however, can also achieve directional control on water using differential motor thrust, provided the radio control system supports appropriate mixing functions. This involves setting up the throttle signal on two channels and mixing it with the rudder channel, allowing for increased thrust on one motor and reduced thrust on the other to effect turns. For example, a right rudder command would reduce the right motor's power by 50% and increase the left motor's power by 50%. If the radio control system does not support such mixing, a physical water rudder must be constructed.
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